12-9.
Both rigid and flexible paving
consist of which of the following
materials?
1.
Sand and gravel
2.
Crushed stone
3.
Binder
4.
All of the above
12–10.
In addition to the asphalt
content, what other factor
determines the principal
characteristics of asphalt
-paving mixes?
1.
The total weight of both
the asphalt content and
aggregates
2.
The relative amount of
aggregates
3.
The largest size aggregate
used
4.
The type of roadbed the
asphalt is used on
12–11.
Asphalts are produced from
refineries in many types and
grades.
The one known as asphalt
cement is the basic material used
in asphalt paving and is produced
in which of the following
conditions?
1.
Hard
2.
Brittle
3.
Semisolid
4.
Water thin
12–12.
Which of the following properties
is essential for an asphalt-
wearing surface?
1.
Retention of antiskid
properties
2.
Resistant to wear
3.
The capability to shed
surface water
4.
All of the above
12–13.
What term is used to describe the
operation of adding more layers of
asphalt to a pavement to increase
its weight-bearing surface?
12-14.
A load-bearing test commonly used
by the Seabees is the CBR test.
What does CBR represent?
1.
Course base repair
2.
California bearing ratio
3.
California base rate
4.
Cold-bearing rate
Learning Objective:
Recognize the
principles of preparing asphalt
for construction operations.
12-15.
Asphalt cement can be made
temporarily fluid (liquefied) for
construction operation in what
three ways?
1.
Emulsifying with water,
melting, and crushing
2.
Melting, dissolving, and
crushing
3.
Heating, dissolving, and
emulsifying
4.
Crushing, heating, and
dissolving
12-16.
The aggregate and binder of a
hot-mix paving mixture should
be heated to what temperature,
in degrees Fahrenheit?
1.
110°F
2.
200°F
3.
310°F
4.
400°F
12-17.
Blue smoke rising from the
spreader hopper is often an
indication of which of the
following asphalt conditions?
1.
The mix is overheated
2.
The mix is too cold
3.
The mix is too rich
4.
The mix is too lean
1.
Surface treatment
2.
Asphalt addition
3.
Stage construction
4.
Subgrade elevation
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